Prosecution Insights
Last updated: July 17, 2026
Application No. 18/248,027

CONTINUOUS PROCESS FOR THE POLYMERIZATION OR OLIGOMERIZATION OF DIPHENYLAMINES

Non-Final OA §103
Filed
Apr 05, 2023
Priority
Oct 06, 2020 — FR FR2010199 +1 more
Examiner
FANG, SHANE
Art Unit
1766
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Nyco
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
1148 granted / 1505 resolved
+11.3% vs TC avg
Strong +19% interview lift
Without
With
+18.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
61 currently pending
Career history
1558
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
73.0%
+33.0% vs TC avg
§102
14.4%
-25.6% vs TC avg
§112
5.3%
-34.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1505 resolved cases

Office Action

§103
Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . DETAILED ACTION All the references cited in the International Search Report have been considered. None is anticipatory or meet the amended claims. The previous restriction has been withdrawn. The wording of “suitable for” in step C of claim 1 is recommended to be removed. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102 of this title, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claim(s) 14-20 and 22-31 is (are) rejected under 35 U.S.C. 103 as being unpatentable over Godici et al. (GB 2384245). As to claims 14-20 and 22-31, Godici (abs., claims, examples. Table 1) discloses a process of continuously mixing and polymerizing/oligomerizing (7:3-30, 8:1-30, Ex.1-4) dioctyldiphenylamine (as to instant claims 17 and 19), 1,2,2,2-tetramethylbuylnaphtalen 1-amine (instant claims 18-19), in presence of di-t-butyl peroxide (as to instant claim 21) and an ester lubricant. The reaction is carried out at 70-200 °C (7:3-5), overlapping with the claimed temperature ranges of instant claims 14-16. It has been found that where claimed ranges overlap ranges disclosed by the prior art, a prima facie case of obviousness exists - see MPEP 2144.05. One of ordinary skill in the art would obviously recognize to apply the disclosed reaction temperature ranges to meet the claimed ones. After the polymerizing/oligomerizing the mixture is heated at 140-200 °C at reduced pressure (7:20-25) for 2 hours to remove reagent residual, particularly the peroxide having a half-life of 1 hour at 70-200 °C. This heating process would inherently reduce the peroxide residual ≤25% (as to instant claims 26-29), because the peroxide has a half-life of 1 hour at 70-200 °C. Particularly to claim 20, Godici (7:9-19) discloses using solvent to dissolve amine reactants. In light of this, one of ordinary skill in the art would obviously recognize to dissolving amine reactants in the ester lubricant before polymerizing/oligomerizing to facilitate the reaction. Furthermore, particularly to claims 23-24, in light of this, one of ordinary skill in the art would obviously recognize to dissolving all the reactants including the lubricant with preheating <70°C to facilitate the sequential polymerizing/oligomerizing and avoid degradation of peroxide, because Godici teaches the peroxide has a half-life of 1 hour at 70-200 °C. Particularly to claim 25, Godici (8:29-30) implies cooling the reaction mixture to equal or above room temperature for product collection. As to claims 30-31, Godici (Table 1) discloses the monomer residual is lower than 3 wt% but is silent on the claimed method of measurement (GC/SFC). Accordingly, the examiner recognizes that not all of the claimed effects or physical properties are positively stated by Godici. However, Godici teaches a process using the claimed steps, claimed processing conditions, and the claimed components in the claimed amounts. Therefore, one of ordinary skill would have a reasonable expectation that the claimed effects and physical properties, i.e. monomer residual measured via GC/SFC, would necessarily flow from a process employing the claimed steps, claimed processing conditions, and the claimed components in the claimed amounts. Where the claimed and prior art products are identical or substantially identical in structure or composition, or are produced by identical or substantially identical processes, a prima facie case of either anticipation or obviousness has been established. See In re Best, 562 F.2d 1252, 1255, 195 USPQ 430, 433 (CCPA 1977); In re Spada, 911 F.2d 705, 709, 15 USPQ2d 1655, 1658 (Fed. Cir. 1990); see also MPEP § 2112.01(I)-(II). If it is the applicant’s position that this would not be the case: (1) applicant must provide evidence to support the applicant’s position, and (2) it would be the examiner’s position that the application contains inadequate disclosure on how to obtain the claimed effects or properties with only the claimed steps, claimed processing conditions, and the claimed components in the claimed amounts. Claim(s) 21 is (are) rejected under 35 U.S.C. 103(a) as being unpatentable over Godici et al. (GB 2384245) ) in view of Zehler et al. (US 20130035268). Disclosure of Godici is adequately set forth in ¶1 and is incorporated herein by reference. Godici is/are silent on the ester of pentaerylthritol/C9 branched carboxylic acid. Godici (3:15-4:10) teach the lubricant embracing a species of an ester of pentaerylthritol/C4-12 branched carboxylic acid. A lubricant of pentaerylthritol/C9 branched carboxylic acid (isononanoic acid) is well known and taught by Zehler (claim 16). In light of this, one of ordinary skill in the art would obviously recognize to utilize the lubricant of pentaerylthritol/C9 branched carboxylic acid (isononanoic acid) as taught by Godici and Zehler. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to SHANE FANG whose telephone number is (571)270-7378. The examiner can normally be reached on Mon-Thurs. 8am-6pm. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Randy Gulakowski can be reached on 571.572.1302. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /SHANE FANG/Primary Examiner, Art Unit 1766
Read full office action

Prosecution Timeline

Apr 05, 2023
Application Filed
May 22, 2026
Non-Final Rejection mailed — §103 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
76%
Grant Probability
95%
With Interview (+18.8%)
2y 5m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1505 resolved cases by this examiner. Grant probability derived from career allowance rate.

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